Blade-sharpening machine.



R. s. GREEN.

, BLADE SHARPENING MACHINE.

APPLICATION FILED DEC. 14,1908.

Patented Mar. 2, 1909.

ZSHEETS-SHBET 1.

E. S. GREEN.

BLADE SHARPENING MACHINE.

APPLICATION FILED DB0.14, 1908.

913,954, Patented Mar. 2, 1909.

2 SHEETS-SHEET 2.

vUNITED RAPHAEL S. GREEN, OF CHICAGO, ILLINOIS.

BLnDE-sHAnPENING MACHINE.

Specification of Lettere Patent.

Patented March 2, 1909.

Application filed December 14, 1908.` Serial No. 467,571.

,To all whom it may concern.'

Be it known that 1, RAPHAEL S. GREEN, a

citizen of the United States, residing at`Cliicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Blade Sharpening 'Machines, of which the following is a description, reference beinghad to the accompanying drawings, forming a part of this specification, in which corresponding characters of reference in the different figures indicate determined intervals, so that the two sides of the blade may be uniformly acted upon by the abrading or sharpening element.

A further ob'ect is to combine in a single machine two a rading disks, each arranged to rotate alternately in opposite directions, and preferably in opposite directions with respect to each other, the one to be used for honing and the other for stropping. Moreover, 1t is my purpose to so construct said machine thatthe alternate reversal of the disksmaybe discontinued at will and the disks caused to rotate continuously in one direction for any predetermined period all of which is hereiiiafterinore particularly described. and definitely pointed out in the claims.

In the drawings, Figure 1 is a front elevation of a machine embodying the features ol m' invention Fig. 2 is a vlan view thereof,

Fig. 3 is an enlarged view, partly invertical section, showing the blade holder and means for reversing it, the section being taken longitudinally through said holder and through the driving gears for actuating it, Fig. 4 is a transverse vertical sectional view through said holder, Fig. 5 is an end view of the inachine, and Fig. 6 is a transverse vertical sectional View taken upon the line 6 6, Fig. 1, viewed in the direction of the ar'row there shown'.

Referring to the drawings, 1 indicates a supporting base to which is bolted'two upright standards 2, provided with bearings 3, in` which is mounted a horizontal driving shaft 4, Figs. 1, 5 and 6, having beveled pin ions' 5 and 6 keyed. to the opposite ends thereof, theforiner of which meshes into a like pinion 7 upon a vertical shaft 8, Figs. 1

i and 3, while the latter meshes into a like gear 9 upon a corresponding vertical shaft, the upper ends of said shaft being supported in suitable bearings 10 and 11, respectively, While the lower ends rest in bearings 10a 11a upon the base, Figs. 1 and 5, formed in outwardly bent arms of the standards 2. Rigidly attached to the left hand shaft in said bearing 10 is a metal disk 12, Figs. 1 and 6, while a like disk 13 is secured in the same manner to the right hand shaft 8.

Supported upon the up )er face of the disk 12 is a stone or abiadinf isk 14 of any suitable material adapted for honing urposes, and upon the disk 13 is secured a isk 15 of leather or other appropriate stro ping material. Said disksare adapted to e rotated alternately in opposite directions by means of the following described mechanism: Mounted upon the main shaft 4, and secured thereto by means of a clutch 16 for the urpose hereinafter stated, is a pinion 16, ligs; 1, 2 and 6, into which meshes the teeth of a segmental driving gear 17, the hub 1S of which is mounted upon a wrist-pin 19 supported. by a lug 20 attached to the basc-plate. A n arm 21 is formed upon or rigidly attached means of a wrist- )in to a )itman 23, the lower end of which is attached o a wrist-pin 24 upon a crank-arin 25 secured to the shaft 26 mounted in bearings upon theI frame. A pulley 27, connected with any suitable source of power, serves to artuate the shaft 26'and in turn, to oscillate the segment 17. l prefer, in practico, l o so proportion the segmental gear 17 and piston 16 with respect to each other, as to cause about six i'evolutioi'is ol the., shaft 4 to each `oscillation of the segment. lnasinuch as the hoyoled gears which connect the shaft 4 with those which operate the disks are of equal size, it follows that each disk will be caused to alternately make six revolutions in one and six revolutions in' another direction successively.

Having described the mechanism for actuating the disks, l will now describe the blade lholders and the means for automatically reversing them to conform to the reverse movement of the disks.

The upper end of each of. theA disk supporting shafts is extended above the upper face of the disk, which it drives, and upon said extension is mounted a loose sleeve 2S, Fig. 3, upon one side of which is a lug 29 hav-- ing a horizontal radial bore adapted to reto the hub 18 and is in turn, connected by nal end of a short detachable shaft 32, which is iitted into one end of the blade-holder 33.

Said blade-holder consists of a hollow semicylindrical casing, shown-in cross-section in Fig. provided with a slot throughout its length into which the blade to be sharpened may be inserted by sliding it into said slot longitudinally. The back or thickened portion of the blade may be inserted within said cylindrical portion while the lips 34 which are by preference bent outwardly, as shown; bear with a spring pressure upon the body of the blade. A plug 35, Figs. 3 and 6, is removably inserted within the opposite end of the holder, said plug having a central bore therein for the reception of a bolt 36, adapted to be projected loosely into a bore 37, formed in the upturned end of a rigid arm 38, one of which is extended horizontally and forwardly from the parts and 11 of the frame. A coiled s ring 39, Fig. 3, is located in a longif tudinallbore in the plug in which the bolt is inserted, while a pin operating in a slot 41, serves to limit the outward movement of the 4bolt which forms the pivotal support for the end of the holder to which it 1s attached. When it becomes necessary to insert or re# move a blade, the bolt is pushed bach against the action .of the spring 39 when the holder may be removed. The plug 35 is then withdrawn and the blade i2 inserted or removed from the part 33. Assuming it to' be inserted, the lug35 is then restored andthe whole inserted in place in the machine as shown. nasmuch as the .sharpening disks are successively reversed, it follows that the holders must also be reversed in order that the blades may be maintained in proper relation thereto. For honing purposes the edge ol the blade must always be op osed to the direction of the movement orn tac dish, or in other words, the dislr must be movedv toward said edge, While for stropping purposes, the oppositel movement is necessary.

Extending outwardl f and upwardly from the parts 10 and 11 in the same plane with the shaft 4, are arms 43 44, upon the ends of which are formed bearings 45 for the reception of the ends of a rock-shaft 46, to which is keyed two segmental gears 47, 48, respectively, adapted to mesh into teeth upon the upper faces of gears 49, which gears likewise have teeth upon their lower faces adapted to engage the pinions 31 upon the bladeholders. Adjustably mounted upon the shaft '46 are collars 51, V52 provided l with radially projecting pins 53, 54 arranged at an angle of about ninety degrees from each other which are intended to be alternately actuated for the purpose of rocking the shaft' 46 and thereby reversing the blade-holders. Upon the shaft 4 are loosely mounted collars classe the long arms 59, 6U of which are extended upwardly and provided with laterally pro# jecting pins .61, 62 in position, when said levers are vibrated to engage the pins 53, 54 and rock the shaft 46 back and forth. The f short arms 63, 64 of said levers extend downward-ly upon opposite sides of the segmental gear 17, upon which sides, respectively, are secured yielding latches 65, 66,- mounted in bores formed in lugs 67 upon the faces of Springs-68 serve to project said latches outwardly. The latches are so the segment near its opposite edges, as indicated in Fig. 6, that they may be alternately brought into positive contact with the levers at the instant when the segment 17 is 'caused to reverse its movement. .Each latch is vided 7with a comparatively long bevel 69 and a short bevel 7 O upon its end, as shown in ll ig. 6, said bevels being reversed with respect to each other as indicated, for the purpose hereinafter stated. The reversing levers 57, 58 are yieldingly held in the respective normal positions indicated in `Fig. 6. Arms 7.1 are extended in opposite directions from the frame into the-respective paths of the levers to form stops 'therefor while a spring 73, one end of which is connected to a respectively against said arms.-

Having thus described the various parts of my improved' device l willnow explain. its operation. Power being applied to the-pnl ley 27 the segment gear 17 is caused to oscillate thereby rotating the shaft fl in,- opposite directions with each reverse niovonient of said gear. disks 12 and i3 to be rotated back and forth lin like manner, but in opposite directions with respect to yeach other, as indicated bythe arrows showninlligs. 2 and 5. Qwing, however, to the fact that the blades are required to be held differently with respect to .the abrading surface, for honing than for stropping, it will be noted that the blades 42, in Figs. 1 and 2, are projected in the same direction and the gears which actuate them are arranged accordingly. The latches and 66 are so adjusted with respect ,to the short arms 63, 6ft ol the levers that when the segment 17 shall have nearly finished its movement in a backward direction the long beveled surface of lower end of the lever arm 63, thereby push ing the latch back against its spring and perl mitting it to pass said arm at the instant whenthe segment shall have reached its extreme backward movement,l it being understood that during said passage the' lever is held in its normal position by means of this stop mechanism described. The latchr 65 the segment as shown in Figs. 1, 2 and 6.

positioned upon.

pin 74 upon the lever and the other to one ci` said arms, serves to normally hold the leversy will then rest in the :position indicated in This in turn causes the '12 the latch 65 will be caused to engage the I that the'relative movement of the segment' 1,7 is muchV greater than that of the rockshaft and hence provision should be made for disengaging the latch `at the proper time.

This is accomplishedv by means of the short bevel thereon, which causes the latch to slip off. from the end of the short arm 63 when the latter is moved to the proper angle. Alike action occurs between the latcli 66 and the arm 64, which results in reversing the movement of the rock-shaft. With each movement of the rock-shaft the blade-holders are reversed thereby shifting the respective blades so as to bring them in proper relation to the4 abrading surfaces of the reversible disks.

I do not Wish to be coniined strictly to the continuous reversing action of the disks for,

as is well known to mechanics skilled in the.

art, it is sometimes necessary owing to variations in the temper or quality of the steel, for the operator to exercise his own Judgment as to the manner in which he shall treat certain blades. In order to accomplish the desired'results it maybe necessary to rotate the shar ening disks continuously in one direction ihr a considerable time.l For this reason I have provided means for throwing the reversing mechanism out of action and bringing a mechanism into action for rotat- 'n t e disks continuously in one direction.

ounted upon the shaft 4 is a normally loose `ulley 7'5 adapted to be actuated by a small elt 76 running in a groove u on `one edge of the pulley' 27 adjacent tot e main driving belt.. The ulley is adapted to be engaged by a clutc 77, which is connected With a clutchml'a by means of a sleeve 78 having collars 79 thereon engaged by a shifting member, not shown, through which the two clutches may be actuated simultaneouslyso as to clutch the gear 16 and release the pulleyor'clutch the ulley and release 'the ge'ai'h Upn moving t e clutch mechanism --to the right the gear is released andthe pulley cause to rotate, thereby running the isks continuously in'one direction. Durinc this time :the blade-holders may be removed andthe blade may be held by hand against the zibradingsurface until the desired result is accomplished whenthe holders may be reinserte the clutches shifted and the regular automatic work continued. This feature is one of importance inasmuch as it enables the 4user to accomplish superior results in the delicateoperation of finishing which might Otherwise reguire a special machine.

From the oregoing it will be seen that the operation of honingI and stropping may be carried on upon the same machine simultaneously and that with speed, uniformity, and recision. l

I o not wish to be coniined to the exact construction shown, as it is obvious that it may be varied without departing from the principle involved.

In the example illustrated I have indicated a holder adapted to receive one of the various forms'of safety razor blades. It is manifest, however,l that the shape and size of -the holder may be made to conform to the character of the blade to be sharpened..

Having thusI described my invention, I claim:

l. `A machine of the class described, in which is combined 'a blade-sharpening disk, means for `rotating' the same, means for reversine` the direction of rotation thereof, a blade-holder, and means for reversing the position thereof with each reverse movement of the disks. 4 l

2. A machine of the classfdescribed, comrising an abrading disk, an oscillating iiolder for -holding a blade in position to be sharpened thereby, means for reversing the direction of rotation of said disk at predetermined intervals, and means, controlled by said disk reversing means, for positively oscillating saidholder in harmony with the reversing movement of said disk.

3. A machine of the class described, comprising a plurality of abrading disks of varymg fineness,`an oscillating ho dei' for holdin a blade in o erative proximity to each of sai disks for sharpening the same, means for rotating said disks in opposite directions with respect to each other, means for automatically reversing the direction of movement of said disks at stated intervals, oscillatory blade-holders in operative' connection with each of said disks, and means for oscillating said blade-holders, respectively, in harmony with each reversal of the disks;

4. A machine of the class described, in which is combined a blade-sharpening disk, an oscillatory segmental driving element for rotating the same in one direction and then inthe other' at predetermined intervals, an oscillatory blade-holder, and means interposed between said segmental driving element and said holder for shifting said bladeholder with each successive movement of said segmental driving element.

5. A machine of the class described, in which is combined a blade sharpening disk, an oscillatory element for reversing its direction of rotation at fixed intervals, a shifting blade-holder, and means in operative connection with said oscillatory element for shifting said blade-holder at the beginning of each reverse movement of said disk.

.6. A machine of the class'described, in which is combined a blade-sharpening disk,

ineens for rotating the same in opposite directions et predetermined intervals and ineens for throwing the reversing ineens ont of action to cause said disk tinuonsly in e given direction.

7. in e machine of the class described, the combination with abrading disks, a common shaft for actuating the seine, two powerreceivinv elements mounted thereon, ineensv for sinniltsneously locking one to and releasing the other lroni the shel't, :t ooininon source of power, means connected therewith ior conveying power to one of said powerrecei'ving elements irst in one direction and l to rotate oonl elses@ then in the other at predetermined intervals, and ineens connected with said source of power i'or driving the other of said powerreceiving elements continuously in one direction. l

in testimony whereof, I have signed this specification in the resence 0f two subscribine' Witnesses, this 11th day of Eecenibei', 1908.

RAPHAEL s. GREEN.

Witnesses y D. H. FLETCHER, CARRIE E. JORDAN. 

